Investigation of the Heat Treatment Effect on Microstructures and Phases of Inconel 713C Superalloy

Azadi, Mohammad; Iziy, Mostafa; Marbout, Armin; Rizi, Mohammad Hassan

doi:10.5829/ije.2017.30.10a.15

Cited by 2 publications

(1 citation statement)

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“…Furthermore, Butler and Weaver [9] reported the formation of coarse-grained microstructures consisting of FCC and BCC phases at 1050 ˚C/520 hr and stabilized FCC, BCC and σ phases at 700˚C/ 1000 h. Most of the researches conducted in the field of manufacture and characterization of alloys with different compounds or the effect of alloying elements on the microstructure and properties. In the last two years, researches have done on the effects of heat treatment [10][11][12] and cold work [13][14][15], but none of them has fully examined the mechanisms of these processes. Homogenization provides the desired microstructure for the annealing process and subsequent aging leads to the development of the service operation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Treatment on Microstructure and Mechanical Properties of Al0.7CoCrFeNi High Entropy Alloy

Asgarkhani,

Seifollahi,

Abbasi

2023

IJE

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In this study, the effects of aging times and temperatures on the microstructure, hardness and compression strength of Al0.7CoCrFeNi high entropy alloy have been investigated. The alloy was cast in a vacuum induction melting furnace, homogenized at 1250 ˚C for 6 h; then aged at 700 to 1000˚C for 2-8 h. The as-cast structure is dendritic and includes FCC(A1) and BCC(A2, B2) phases with the hardness of 497 HV. During ageing, B2 precipitates at the grain boundaries at 700˚C and the hardness increases about 7%. The ratio of BCC to FCC phases on the basis of XRD in as-cast alloy is approximately equal which is increased by ageing at 700˚C. At 800˚C, the formation of a destructive and hard phase of σ cause to increases the hardness to 543 HV and the ratio of (A2+B2)/A1 has decreased. At 1000 ˚C, the ratio of (A2+ B2)/A1 increases, and the peak intensity of σ decreases, so that the hardness value decreases to 385 HV. The results of hot deformation test showed that the alloy at the strain rate of 10-3 s-1 and temperatures of 800, 900, 1000 and 1100˚C has a yield strength of 306, 179, 91 and 50 MPa, respectively.

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